Messages in this thread Patch in this message | | | Date | Fri, 11 Mar 2022 18:30:05 -0000 | From | "tip-bot2 for Li Huafei" <> | Subject | [tip: x86/urgent] x86/traps: Mark do_int3() NOKPROBE_SYMBOL |
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The following commit has been merged into the x86/urgent branch of tip:
Commit-ID: a365a65f9ca1ceb9cf1ac29db4a4f51df7c507ad Gitweb: https://git.kernel.org/tip/a365a65f9ca1ceb9cf1ac29db4a4f51df7c507ad Author: Li Huafei <lihuafei1@huawei.com> AuthorDate: Thu, 10 Mar 2022 20:09:15 +08:00 Committer: Borislav Petkov <bp@suse.de> CommitterDate: Fri, 11 Mar 2022 19:19:30 +01:00
x86/traps: Mark do_int3() NOKPROBE_SYMBOL
Since kprobe_int3_handler() is called in do_int3(), probing do_int3() can cause a breakpoint recursion and crash the kernel. Therefore, do_int3() should be marked as NOKPROBE_SYMBOL.
Fixes: 21e28290b317 ("x86/traps: Split int3 handler up") Signed-off-by: Li Huafei <lihuafei1@huawei.com> Signed-off-by: Borislav Petkov <bp@suse.de> Acked-by: Masami Hiramatsu <mhiramat@kernel.org> Cc: <stable@vger.kernel.org> Link: https://lore.kernel.org/r/20220310120915.63349-1-lihuafei1@huawei.com --- arch/x86/kernel/traps.c | 1 + 1 file changed, 1 insertion(+)
diff --git a/arch/x86/kernel/traps.c b/arch/x86/kernel/traps.c index c9d566d..8143693 100644 --- a/arch/x86/kernel/traps.c +++ b/arch/x86/kernel/traps.c @@ -659,6 +659,7 @@ static bool do_int3(struct pt_regs *regs) return res == NOTIFY_STOP; } +NOKPROBE_SYMBOL(do_int3); static void do_int3_user(struct pt_regs *regs) {
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